Macro molecule chitin is:

Options

A. Suluphur containing polysaccharide
B. simple polysaccdaride
C. nitrogen containing polysaccharide
D. phosphorus containg polysaccharide

Answer

**Step-by-Step Solution:**

1. **Identify the Macromolecule**: The question asks about the macromolecule chitin. Start by recognizing that chitin is indeed a macromolecule.

2. **Understand the Composition**: Chitin is a derivative of glucose. This means it is formed from glucose or has a structure related to glucose.

3. **Determine the Type of Polysaccharide**: Chitin is classified as a polysaccharide. Specifically, it is a nitrogen-containing polysaccharide. This is crucial because it distinguishes chitin from other types of polysaccharides.

4. **Describe the Structure**: The structure of chitin consists of long chains of N-acetylglucosamine, which is a modified form of glucose that includes nitrogen.

5. **List Functions of Chitin**: Chitin serves several important biological functions:
- It forms the cell wall of fungi.
- It makes up the exoskeleton of arthropods (e.g., insects, crustaceans).
- It contributes to the beaks and internal shells of cephalopods (e.g., squids, octopuses).
- It is a component of the radula in mollusks.

6. **Evaluate the Options**: Given the options provided in the question:
- **Sulfur-containing polysaccharide**: Incorrect, as chitin contains nitrogen, not sulfur.
- **Simple polysaccharide**: Incorrect, as chitin is a complex polysaccharide, not simple.
- **Nitrogen-containing polysaccharide**: Correct, as chitin contains nitrogen in its structure.
- **Phosphorus-containing polysaccharide**: Incorrect, as chitin does not contain phosphorus.

7. **Conclusion**: Based on the analysis, the correct answer is that chitin is a nitrogen-containing polysaccharide.

**Final Answer**: Chitin is a nitrogen-containing polysaccharide.

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